Hormonal
Time-restricted feeding (TRF) restricted to an early window (e.g., 6 hours ending before 3 PM) improves metabolic health markers (insulin sensitivity, blood pressure, oxidative stress) in humans independent of weight loss, whereas late TRF or unrestricted late eating worsens glucose tolerance and metabolic profiles.
If you are prediabetic or overweight, try restricting your eating window to 6-8 hours, ensuring your last meal is finished by 3 PM. This specific timing improves insulin sensitivity and blood pressure without requiring weight loss. Avoid eating late in the evening (after 4 PM), as this worsens glucose tolerance regardless of total calories. If you cannot eat early, focus on reducing late-night snacking and aligning meals closer to your natural melatonin onset.
When a 6 h feeding period, with dinner before 3 PM was compared to a control schedule (12 h feeding period) for 5 weeks in a randomized crossover trial of prediabetic men, insulin sensitivity, blood pressure, and oxidative stress levels were improved during the early time-restricted feeding regimen without any effect on body weight144.
Why this rating
Based on multiple randomized crossover trials and observational studies in humans, though sample sizes vary and long-term adherence data is limited.
Source
Importance of circadian timing for aging and longevity
Victoria A. Acosta-Rodríguez et al. · Nature Communications · 2021
DOI 10.1038/s41467-021-22922-6
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